1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.journal.util.comparator;
24  
25  import com.liferay.portal.kernel.util.DateUtil;
26  import com.liferay.portal.kernel.util.OrderByComparator;
27  import com.liferay.portlet.journal.model.JournalArticle;
28  
29  /**
30   * <a href="ArticleDisplayDateComparator.java.html"><b><i>View Source</i></b>
31   * </a>
32   *
33   * @author Brian Wing Shun Chan
34   */
35  public class ArticleDisplayDateComparator extends OrderByComparator {
36  
37      public static String ORDER_BY_ASC = "displayDate ASC, version ASC";
38  
39      public static String ORDER_BY_DESC = "displayDate DESC, version DESC";
40  
41      public static String[] ORDER_BY_FIELDS = {"displayDate", "version"};
42  
43      public ArticleDisplayDateComparator() {
44          this(false);
45      }
46  
47      public ArticleDisplayDateComparator(boolean asc) {
48          _asc = asc;
49      }
50  
51      public int compare(Object obj1, Object obj2) {
52          JournalArticle article1 = (JournalArticle)obj1;
53          JournalArticle article2 = (JournalArticle)obj2;
54  
55          int value = DateUtil.compareTo(
56              article1.getDisplayDate(), article2.getDisplayDate());
57  
58          if (value == 0) {
59              if (article1.getVersion() < article2.getVersion()) {
60                  value = -1;
61              }
62              else if (article1.getVersion() > article2.getVersion()) {
63                  value = 1;
64              }
65          }
66  
67          if (_asc) {
68              return value;
69          }
70          else {
71              return -value;
72          }
73      }
74  
75      public String getOrderBy() {
76          if (_asc) {
77              return ORDER_BY_ASC;
78          }
79          else {
80              return ORDER_BY_DESC;
81          }
82      }
83  
84      public String[] getOrderByFields() {
85          return ORDER_BY_FIELDS;
86      }
87  
88      public boolean isAscending() {
89          return _asc;
90      }
91  
92      private boolean _asc;
93  
94  }